摘要
【目的】研究湖北省秭归县柑橘园土壤的养分特征和肥力状况,为柑橘园土壤肥力精准管理和可持续经营提供科学依据。【方法】选取pH值、土壤有机质、全氮、碱解氮、全磷、有效磷、全钾和速效钾含量8个指标,依据土壤普查分级标准,并结合内梅罗综合指数法,对土壤养分及肥力进行评价。【结果】研究区柑橘园土壤pH值总体呈弱酸性。不同土壤类型中,有机质含量随着土层加深而降低。研究区域内有机质含量低于20 g·kg^(−1)的分布频率超过50%,土壤有机质呈缺乏状态。随土层深度增加,全氮、全磷、有效磷和速效钾含量降低,表土层的全氮、全磷、碱解氮和速效钾含量与其他土层有显著差异(P<0.05)。同一土壤类型中,土壤综合肥力在不同土层间有显著性差异(P<0.05)。不同土壤类型的综合肥力表现为黄壤>水稻土>石灰土>紫色土,肥力指数均介于0.90~1.80之间,属于“中等”肥力。【结论】秭归县柑橘园各土壤类型中的养分均表现为有机质和碱解氮缺乏,肥力均属“中等”水平,今后在柑橘园的管理中,需根据其养分缺乏程度,合理增施含氮元素的有机肥,以便改良土壤、提升土壤肥力。
【Objective】Soil nutrient characteristics and fertility status of citrus orchard in the Zigui County Hubei Province were studied, which provided the scientific basis for precise management and sustainable management of soil fertility. 【Methods】Eight indexes, including pH value, soil organic matter, total nitrogen, alkali hydrolyzable nitrogen, total phosphorus, available phosphorus,total potassium, and available potassium were taking account in this study. The evaluation of soil nutrient and fertility were conducted with the classification standard of soil survey and Nemerro comprehensive index method. 【Results】The soil pH in citrus orchard in the study area was generally weak acidic. With the increase of soil depth, the content of soil organic matter decreased in different soil types. The distribution frequency of organic matter content less than 20 g·kg-1 accounts for more than 50% in the study area,which revealed that the soil organic matter was deficient. With the increase of soil depth, the contents of total nitrogen, total phosphorus, available phosphorus and available potassium decreased. In addition, the contents of total nitrogen, total phosphorus,alkali hydrolyzable nitrogen and available potassium in top soil were significantly different from those in other soil layers(P < 0.05).In the same soil type, there was significantly difference in soil comprehensive fertility among different soil layers(P < 0.05). The comprehensive fertility quality of different soil types trend as yellow earths > paddy soils > limestone soils > purplish soils, with records of fertility index within the range of 0.90~1.80, and the fertility is “medium”. 【Conclusion】The nutrients in various soil types in citrus orchards in Zigui County showed deficient in soil organic matter and alkali hydrolyzable nitrogen, and the fertility status was at the "medium" level. Therefore, it is necessary to reasonably increase the application of organic fertilizer containing nitrogen elements to improve the soil and enhance the
作者
陈会玲
胡建文
勾蒙蒙
王娜
朱粟锋
肖文发
刘常富
Chen Huiling;Hu Jianwen;Gou Mengmeng;Wang Na;Zhu Sufeng;Xiao Wenfa;Liu Changfu(Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration,Ecology and Nature Conservation Institute,Chinese Academy of Forestry,Beijing 100091,China;Co-Innovation Center for Sustainable Forestry in Southern China,Nanjing Forestry University,Nanjing 210037,China)
出处
《陆地生态系统与保护学报》
2022年第4期21-31,共11页
Terrestrial Ecosystem and Conservation
基金
国家自然科学基金项目(32172671)
国家自然科学基金重点项目(32130074)。
关键词
柑橘
土壤类型
土壤养分
肥力评价
Citrus reticulata
soil type
soil nutrient
fertility evaluation
